用罗丹明B乙二胺分步取代三聚氯氰环上两个氯原子, 得到对称结构的罗丹明-三嗪衍生物。 在pH 4～6的乙醇溶液中, 衍生物能选择性识别Al3+和Cr3+, 荧光发射和紫外-可见吸收显著增强。 衍生物对Al3+ 和Cr3+识别不受共存金属离子干扰。 在一定条件下, 可作为高选择性和高灵敏的Al3+或Cr3+荧光和比色增强型光谱探针。

A symmetrical rhodamine-triazine derivative was synthesized through step-by-step substitution of rhodamine B ethylenediamine with two chlorines on cyanuric chloride. It showed an extreme selectivity for Al3+ and Cr3+ over other common metal ions and strong fluorescence emission and UV-Visible absorption in the ethanol solution of pH 4. Due to the difference in complexing ability, the recognition of the derivative for Al3+ and Cr3+was not interfered by other coexisting ions. Under certain conditions, the derivative can be used as high selectivity and high sensitivity Al3+ or Cr3+ fluorescence and colorimetric enhanced probe.